Registration Dossier

Administrative data

Endpoint:
Henry's law constant
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Peer-reviewed study reported with a sufficient level of details.

Data source

Reference
Title:
Solvation properties of refrigerants and the estimation of their water-solvent and gas-solvent partitions.
Author:
Abraham, M.H., Gola, J.M.R., Cometto-Muniz, J.R., Cain, W.S.
Year:
2001
Bibliographic source:
Fluid Phase Equilibria 180, 41-58

Materials and methods

Test material

Constituent 1
Chemical structure
Reference substance name:
Pentafluoroethane
EC Number:
206-557-8
EC Name:
Pentafluoroethane
Cas Number:
354-33-6
Molecular formula:
C2HF5
IUPAC Name:
1,1,1,2,2-pentafluoroethane

Results and discussion

Henry's Law constant H
H:
ca. 28 180 Pa m³/mol
Temp.:
25 °C

Any other information on results incl. tables

The HLC constant may be calculated from the equation below:


Ls = R x T x d/(HLC x MW)

Where Ls is the Ostwald coefficient for HFC-125 in water (Log Ls=-1.059), R is the universal gas constant (8.31 J K-1mol-1), T is the temperature (298.15 K), d and MW are the water density (1 x 106 g/m3) and Molecular weight (18 uma), respectively.
HLC (per unit mole fraction) = 1,559 MPa which can be converted to HLC [Pa m3/mol] by dividing for the conversion factor 55323, thus:
HLC = 28,180 Pa m3/mol

Applicant's summary and conclusion